MiCOM P921/P922/P923 - Schneider - error

P92x/EN CM/F22Page 10/26Commissioning GuideMiCOM P921/P922/P9234.2.3 Light Emitting Diodes (LEDs)On power up the green LED should have illuminated and stayed on indicating that the relayis healthy. The relay has non-volatile memory which remembers the state (on or off) of thealarm and trip LEDs when the relay was last energised from an auxiliary supply. Thereforethese indicators may also illuminate when the auxiliary supply is applied.If any of these LEDs are on then they should be reset before proceeding with further testing.If the LEDs successfully reset (the LED goes out), there is no testing required for that LEDbecause it is known to be operational.4.2.3.1 Testing the alarm LEDTo do this, activate the "Undervoltage" function, 1 st stage.If there is no voltage across the VT inputs, the "alarm" LED begins to flash and a messageappears on the front panel.4.2.3.2 Testing the trip LEDRepeat the previous test and allocate the time-delayed information (tV